vscode customdata not working as expected

[antony-qtpi]

I am using vscode settings.json in my project to make use of html auto complete feature. My settings file is as below:
{
"html.experimental.customData": [
"./html.html-data.json"
],
}
And the html.html-data.json file is just the sample from here.
https://github.com/microsoft/vscode-extension-samples/blob/main/custom-data-sample/html.html-data.json

While using this example i could able to achieve the auto completion of tags, but the "references" information which has the url and description which are not displayed. As well as the code snippet in description also get treated as simple text.

Please provide if any solution or alternatives.